第10页

信息发布者:
$\begin{aligned}&\frac{5}{11}×\frac{8}{9}+\frac{5}{11}÷9\\=&\frac{5}{11}×\frac{8}{9}+\frac{5}{11}×\frac{1}{9}\\=&\frac{5}{11}×(\frac{8}{9}+\frac{1}{9})\\=&\frac{5}{11}×1\\=&\frac{5}{11}\end{aligned}$
$\begin{aligned}&860-112÷8×45\\=&860-14×45\\=&860-630\\=&230\end{aligned}$
$\begin{aligned}&2.8×\frac{3}{8}+6.2×0.375+37.5\%\\=&2.8×0.375+6.2×0.375+1×0.375\\=&0.375×(2.8+6.2+1)\\=&0.375×10\\=&3.75\end{aligned}$
1
2

$4:1$